I'm not completely sure what's going to happen in this story yet, but I wanted to write something about Toni and Billie, so I thought I'd just start and decide what happens as I go along. I won't have much time to update, as I've got exams this month, but I'll just update when I can.

Toni POV

"What's wrong with you, Billie?" I asked my sister. Billie had been acting strangely all day; nothing noticeable, but I knew my twin well enough to know that something wasn't right.

Billie wasn't giving anything away, though.

"I'm fine," she snapped at me. "Now can you just leave me alone?"

"Okay," I shrugged, bewildered. It was definitely not like Billie to get irritated like that; it was usually me who got annoyed. Billie and I were pretty similar in personality, but there were some subtle differences; Billie was slightly quieter than me.

"Right, well," I said, trying to distract her. "Do you think we should go?"

"Where?"

"Haven't you been listening to anything I said? The cinema, Billie! Floss is going to see the new Disney film tomorrow with Harry and Finn, and she was asking if we wanted to go with them."

"Oh, right." Billie tried to pay attention to what I was saying. "Um…"

"I said we'd go with them," I interrupted. "But we don't have to." I'd assumed that Billie would want to go; May-Li always bought us popcorn, which was Billie's favourite food. Now, though, after the way Billie had been all day, I wasn't sure.

"So." I asked, after a pause in which Billie hadn't replied. "Do you want to or not?"

"Uh, yeah," Billie said vaguely, but I could tell that she still wasn't really listening. I sighed.

"What is up with you today, Billie? You've been in a mood for the whole day. If there's something wrong, why don't you just tell me?"

"I can't," Billie muttered.

"Why not?" I was annoyed now. "We always tell each other everything. What's so bad that you can't tell me?"

"Nothing!" Billie insisted. "I'm fine; now can we please change the subject?"

"Whatever," I said. "It's you who keeps being moody. So, what about the film?"

"Yeah, it sounds good, I suppose. I liked the look of the trailer, anyway."

"Let's go and tell May-Li we're going, then." I said. I took one last look at Billie; she still looked upset about something, but I decided to leave it. Hopefully she'd tell me what was up later.

As we went through the living room, Floss came up.

"Do you two have matching clothes or something you could wear tomorrow?" she demanded.

"Huh? What are you talking about?" I was used to Floss's full-on ways; hanging out with her was never boring as she always had some sort of crazy idea. I liked that about her, and it was the reason why even though she was only seven, she was one of my best friends at the dumping ground. But this time, I had no idea what she was on about.

"Why would we want to wear matching clothes?" Billie asked her.

"Well," Floss grinned mischievously. "I've got this idea, for making money…"

"Right," I said, slightly suspicious.

"Well, you know my dancing? I thought I could busk again, like I did at the open day."

"What open day?" asked Billie.

Oh, you know, the one at the dumping ground, for people who wanted to foster one of us. It was a few weeks before you came."

"Oh, yeah," I said. "Mo told me about that. Someone stole a load of wallets, didn't they?"

"Yeah, but anyway, I made loads of money that time. So I was thinking, I could do it again, in town. Only you and Billie can help me this time. We can sneak away tomorrow, when we go to the cinema."

"I suppose so," I said, though I wasn't quite sure what she was on about. Knowing Floss, though, it would be good fun, so we might as well help her. "Billie and I can't dance, though."

"That's why I want you to wear matching outfits!" Floss told me. "Everyone finds twins cute, right? So if you flaunt it, nobody will be able to resist you two. We'll make loads of money."

"Okay, then, we might as well try your plan," I said. "But there's no way me and Billie are wearing matching dresses." Luckily, people could usually tell us apart as I had a slightly rounder face than Billie, but still, wearing the same clothes would be way embarrassing.

"Is that all right with you?" I asked Billie; she was still being quiet.

"Yeah," she muttered.

"Are you sure?" I clarified. "Billie?"

"Yeah, I am, okay?" Billie suddenly snapped. "Can you just shut up? Stop asking what's wrong with me! You don't know anything! Just leave me alone!"

I stared, speechless, as she ran off.

"What's wrong with her today?" Floss asked me.

"I don't know." I told her. "I really don't." Billie had never been like this before; we always knew everything about each other. Sometimes it was like we were the same person; that's what was good about having a twin.

Only now, she wasn't telling me what was wrong. I couldn't believe she'd spoken to me like that, told me to leave her alone. Something must be really wrong with her. And for once, I didn't know how to help her.

Somehow, I had to find out what was the matter with Billie.